I am a novice and I am struggling hard to get to the root of my display problem. Whenever I start my laptop Dell Inspiron 8100 , the screen start behaving oddly . It shows random lines all over the screen and I can not do anything . It remains like that. I tried connecting the laptop to external projector and monitor and the same problem repeats so I suspect that problem is not with screen . What I get on external monitor is same as what I see on my LCD: Rubbish . I suspect that problem is somewhere with Video card or somewhere else.
Can you please guide me as to how I should proceed.
Thanks a lot for your help